<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>注册页面</h1>
<form action="">
    <input type="text" name="username" placeholder="请输入用户名" @blur="check()">{{info}}<br>
    <input type="text" name="password" placeholder="请输入密码"><br>
    <input type="text" name="nick" placeholder="请输入昵称"><br>
    <input type="button" value="注册" @click="reg()">
</form>
<!--引入axios和vue-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
    let v = new Vue({
        el: "form",
        data: {
            info: ""
        },
        methods: {
            check: function () {
                let data = new FormData(document.querySelector("form"));
                axios.post("/check", data).then(function (response) {
                    v.info = response.data == 1 ? "用户名可用" : "用户名已存在";
                })
            },
            reg: function () {
                let data = new FormData(document.querySelector("form"));
                axios.post("/reg", data).then(function (response) {
                    if (response.data == 1) {
                        alert("注册成功!");
                        location.href = "/login.html";
                    } else{
                        alert("用户名已存在!");
                    }
                })
            }
        }
    })
</script>
</body>
</html>